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Feng Tang d999bd9392 panic: add options to print system info when panic happens 
Kernel panic issues are always painful to debug, partially because it's
not easy to get enough information of the context when panic happens.

And we have ramoops and kdump for that, while this commit tries to
provide a easier way to show the system info by adding a cmdline
parameter, referring some idea from sysrq handler.

Link: http://lkml.kernel.org/r/1543398842-19295-2-git-send-email-feng.tang@intel.com
Signed-off-by: Feng Tang <feng.tang@intel.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-01-04 13:13:47 -08:00
..
bpf
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2018-12-20 17:31:36 -08:00
cgroup
Merge branch 'for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2018-12-29 10:57:20 -08:00
configs
kvm_config: add CONFIG_VIRTIO_MENU
2018-10-24 20:55:56 -04:00
debug
kdb: use bool for binary state indicators
2018-12-30 08:31:52 +00:00
dma
DMA mapping updates for Linux 4.21
2018-12-28 14:12:21 -08:00
events
mm/mmu_notifier: use structure for invalidate_range_start/end calls v2
2018-12-28 12:11:50 -08:00
gcov
gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT
2018-06-08 18:56:02 +09:00
irq
genirq/affinity: Add is_managed to struct irq_affinity_desc
2018-12-19 11:32:08 +01:00
livepatch
livepatch: Replace synchronize_sched() with synchronize_rcu()
2018-12-01 12:38:50 -08:00
locking
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-12-26 14:25:52 -08:00
power
mm: convert totalram_pages and totalhigh_pages variables to atomic
2018-12-28 12:11:47 -08:00
printk
Printk changes for 4.21
2018-12-27 11:24:43 -08:00
rcu
rcutorture: Don't do busted forward-progress testing
2018-12-01 12:45:42 -08:00
sched
sched/fair: Fix infinite loop in update_blocked_averages() by reverting a9e7f6544b9c
2018-12-30 13:54:31 +01:00
time
y2038: more syscalls and cleanups
2018-12-28 12:45:04 -08:00
trace
Tracing changes for v4.21:
2018-12-31 11:46:59 -08:00
.gitignore
…
acct.c
…
async.c
…
audit_fsnotify.c
audit: minimize our use of audit_log_format()
2018-11-26 18:40:00 -05:00
audit_tree.c
audit: minimize our use of audit_log_format()
2018-11-26 18:40:00 -05:00
audit_watch.c
audit: minimize our use of audit_log_format()
2018-11-26 18:40:00 -05:00
audit.c
audit: remove duplicated include from audit.c
2018-12-14 12:09:30 -05:00
audit.h
audit: use current whenever possible
2018-11-26 18:41:21 -05:00
auditfilter.c
audit: rename FILTER_TYPE to FILTER_EXCLUDE
2018-06-19 10:39:54 -04:00
auditsc.c
audit: use current whenever possible
2018-11-26 18:41:21 -05:00
backtracetest.c
…
bounds.c
kbuild: fix kernel/bounds.c 'W=1' warning
2018-10-31 08:54:14 -07:00
capability.c
…
compat.c
y2038: globally rename compat_time to old_time32
2018-08-27 14:48:48 +02:00
configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
x86/speculation: Rework SMT state change
2018-11-28 11:57:07 +01:00
crash_core.c
kernel/crash_core.c: print timestamp using time64_t
2018-08-22 10:52:47 -07:00
crash_dump.c
…
cred.c
cred: export get_task_cred().
2018-12-19 13:52:44 -05:00
delayacct.c
delayacct: track delays from thrashing cache pages
2018-10-26 16:26:32 -07:00
dma.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
elfcore.c
…
exec_domain.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
exit.c
signal: Pass pid type into group_send_sig_info
2018-07-21 12:57:35 -05:00
extable.c
…
fail_function.c
kernel/fail_function.c: remove meaningless null pointer check before debugfs_remove_recursive
2018-10-31 08:54:12 -07:00
fork.c
fork: fix some -Wmissing-prototypes warnings
2019-01-04 13:13:47 -08:00
freezer.c
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
futex.c
y2038: more syscalls and cleanups
2018-12-28 12:45:04 -08:00
groups.c
…
hung_task.c
kernel/hung_task.c: break RCU locks based on jiffies
2019-01-04 13:13:45 -08:00
iomem.c
memremap: split devm_memremap_pages() and memremap() infrastructure
2018-05-15 23:08:33 -07:00
irq_work.c
…
jump_label.c
Merge branch 'x86/build' into locking/core, to pick up dependent patches and unify jump-label work
2018-10-16 17:30:11 +02:00
kallsyms.c
kallsyms: reduce size a little on 64-bit
2018-09-10 22:54:33 +09:00
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
kconfig: warn no new line at end of file
2018-12-15 17:44:35 +09:00
kcov.c
kernel/kcov.c: mark funcs in __sanitizer_cov_trace_pc() as notrace
2018-11-30 14:56:14 -08:00
kexec_core.c
mm: convert totalram_pages and totalhigh_pages variables to atomic
2018-12-28 12:11:47 -08:00
kexec_file.c
kexec_file: kexec_walk_memblock() only walks a dedicated region at kdump
2018-12-06 14:38:50 +00:00
kexec_internal.h
…
kexec.c
kexec: add call to LSM hook in original kexec_load syscall
2018-07-16 12:31:57 -07:00
kmod.c
…
kprobes.c
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-12-26 14:45:18 -08:00
ksysfs.c
…
kthread.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
latencytop.c
…
Makefile
y2038: more syscalls and cleanups
2018-12-28 12:45:04 -08:00
memremap.c
mm/hmm: fix memremap.h, move dev_page_fault_t callback to hmm
2018-12-28 12:11:52 -08:00
module_signing.c
modsign: use all trusted keys to verify module signature
2018-11-07 14:41:41 +01:00
module-internal.h
modsign: log module name in the event of an error
2018-07-02 11:36:17 +02:00
module.c
Driver core patches for 4.21-rc1
2018-12-28 20:44:29 -08:00
notifier.c
…
nsproxy.c
…
padata.c
padata: clean an indentation issue, remove extraneous space
2018-11-16 14:11:04 +08:00
panic.c
panic: add options to print system info when panic happens
2019-01-04 13:13:47 -08:00
params.c
…
pid_namespace.c
signal: Use group_send_sig_info to kill all processes in a pid namespace
2018-09-16 16:08:25 +02:00
pid.c
Fix failure path in alloc_pid()
2018-12-28 12:42:30 -08:00
profile.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
ptrace.c
ptrace: Remove unused ptrace_may_access_sched() and MODE_IBRS
2018-11-28 11:57:11 +01:00
range.c
…
reboot.c
kernel/reboot.c: export pm_power_off_prepare
2018-09-11 16:13:24 +01:00
relay.c
kernel/relay.c: change return type to vm_fault_t
2018-06-15 07:55:24 +09:00
resource.c
kernel, resource: check for IORESOURCE_SYSRAM in release_mem_region_adjustable
2018-12-28 12:11:49 -08:00
rseq.c
rseq: uapi: Declare rseq_cs field as union, update includes
2018-07-10 22:18:52 +02:00
seccomp.c
seccomp: fix poor type promotion
2018-12-13 16:49:01 -08:00
signal.c
y2038: signal: Add compat_sys_rt_sigtimedwait_time64
2018-12-18 16:13:04 +01:00
smp.c
smp,cpumask: introduce on_each_cpu_cond_mask
2018-10-09 16:51:11 +02:00
smpboot.c
smpboot: Remove cpumask from the API
2018-07-03 09:20:44 +02:00
smpboot.h
…
softirq.c
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-10-25 11:43:47 -07:00
stackleak.c
stackleak: Mark stackleak_track_stack() as notrace
2018-12-05 19:31:44 -08:00
stacktrace.c
…
stop_machine.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-13 11:25:07 -07:00
sys_ni.c
y2038: socket: Add compat_sys_recvmmsg_time64
2018-12-18 16:13:04 +01:00
sys.c
arm64: add prctl control for resetting ptrauth keys
2018-12-13 16:42:46 +00:00
sysctl_binary.c
…
sysctl.c
proc/sysctl: fix return error for proc_doulongvec_minmax()
2019-01-04 13:13:45 -08:00
task_work.c
…
taskstats.c
…
test_kprobes.c
kprobes: Remove jprobe API implementation
2018-06-21 12:33:05 +02:00
torture.c
torture: Remove unnecessary "ret" variables
2018-12-01 12:45:35 -08:00
tracepoint.c
tracing: Replace synchronize_sched() and call_rcu_sched()
2018-11-27 09:21:41 -08:00
tsacct.c
…
ucount.c
…
uid16.c
…
uid16.h
…
umh.c
umh: Add command line to user mode helpers
2018-10-22 19:37:36 -07:00
up.c
smp,cpumask: introduce on_each_cpu_cond_mask
2018-10-09 16:51:11 +02:00
user_namespace.c
userns: also map extents in the reverse map to kernel IDs
2018-11-07 23:51:16 -06:00
user-return-notifier.c
…
user.c
userns: use irqsave variant of refcount_dec_and_lock()
2018-08-22 10:52:47 -07:00
utsname_sysctl.c
sys: don't hold uts_sem while accessing userspace memory
2018-08-11 02:05:53 -05:00
utsname.c
…
watchdog_hld.c
watchdog: Mark watchdog touch functions as notrace
2018-08-30 12:56:40 +02:00
watchdog.c
watchdog: Mark watchdog touch functions as notrace
2018-08-30 12:56:40 +02:00
workqueue_internal.h
workqueue: Set worker->desc to workqueue name by default
2018-05-18 08:47:13 -07:00
workqueue.c
workqueue: Replace call_rcu_sched() with call_rcu()
2018-11-27 09:21:44 -08:00